Wrench.



A. G. ALLEN.

WRENCH.

APPLICATION FILED JULY 19,

Patented May 11, 1909.

ARTHUR CLARK ALLEN, OF RIVERSIDE, CALIFORNIA.

WRENCH.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed. July 18, 1908. Serial No. 444,172.

To all whom it may concern:

Be it known that I, ARTHUR O. ALLEN, a citizen of the United States,residing at Riverside, in the county of Riverside and State ofCalifornia, have invented a new and useful Wrench; and I do herebydeclare the following to be a full, clear, and exact deable othersskilled in the art to which it appertains to make and use the same.

The invention relates to an improvement in pipe wrenches and has for itsobject to provide a simple, efficient and durable device of thischaracter having adjusting means which will enable the same to beapplied to pipes of various sizes.

With these and other objects in view, the invention consists in thenovel construction and arrangement of parts hereinafter described andshown and particularly pointed out in the appended cla1n1.

In the drawings Figure 1 is a side elevation of a wrench constructed inaccordance with this invention. Fig. 2 is a longitudinal sectional view.Fig. 3 is a detail perspective view of the box or frame.

Referring to the drawings, 1 designates the shank which is connectedwith a jaw 2, the two being formed integral with each other. The jaw 2cooperates with the slidable or adjustable jaw 3 which is connected to ashank 4. The shanks 1 and 4 and the jaws 2 and 3 are independent of eachother in construction, and are held together by means of a box or frame5. The box or frame 5 is pivotally connected to the jaw 2, as clearlyshown in the drawings, and the shank 4 is slidably mounted in the frameor box 5. The aws are provided with the usual teeth for gripping a pipe.The outer face of the shank 4 is also provided with teeth or serrations6 which are engaged by like teeth or serrations 7 formed in the box orframe, as clearly shown in Fig. 2 of the drawings. The two shanks areheld in engagement by means of a spring 7 which is mounted on the shank1 and which engages a projection 8 of the box or frame. The shank 4 ofthe jaw member 3 has a longitudinal recess 9 in its under surfaceadapted to receive a projection 9 on the upper surface of shank 1 of thejaw 2 for guiding the members of the wrench and preventing lateraldisplacement and to reinforce the resisting action, when in the act ofturning a nut from the shank of a bolt. scription of the invention, suchas will ena It will be seen that when it is desired to adjust the jaws,the portion 8 is pressed against the spring which releases the shank 4and the movable jaw and the two jaws are then free to be adjusted.

It will be seen that my invention is simple, durable and efficient andthat it is capable of engaging pipes of various sizes and that thegripping power of said wrench is exceptionally strong and firm.

What I claim is A relatively fixed jaw member and a slidable jaw member,adapted to coact with said fixed jaw member having its shank portionprovided with a projection and said movable jaw member having alongitudinal slot or groove receiving said projection, a coupling memberembracing said jaw member and having an inner central projectionprovided with a serrated or toothed surface engaging a correspondingsurface of the shank portion of the movable jaw member, said couplingmember having an arm or extension having an opening through which theshank portion of said fixed jaw member extends with one end extendingaway from the shank portion of the said movable jaw member and a springfixed to said fixed jaw member and having a bent portion disposed withinsaid opening, said spring adapted to deliver its pressure or tensionupon said arm of said coupling, said fixed jaw member having a slot orrecess receiving the bent portions of said spring.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ARTHUR CLARK ALLEN.

Witnesses:

E. B. HEWITT, W. D. CONGDON.

